| If we are to achieve a full understanding of deviant behaviour, we must get these two foci of inquiry into balance. |
| Kepler showed that a planet moves round the Sun in an elliptical orbit which has the Sun in one of its two foci. |
| He described the construction of an ellipse with a string fixed at the two foci. |
| Metastatic foci were also seen in the mesenteric lymph nodes, pancreas, stomach, visceral pleura, and bone marrow. |
| The problems with the microlens array design are low light throughput, non-uniform intensity foci, and lens aberrations. |
| The distribution and control of offices, such as countships, abbacies, and bishoprics, became the main foci of the political rivalries. |
